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70 Cards in this Set
- Front
- Back
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awk/nawk [options] file
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scan for patterns in a file and process the results
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cat [options] file
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concatenate (list) a file
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cd [directory]
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change directory
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chgrp [options] group file
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change the group of the file
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chmod [options] file
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change file or directory access permissions
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chown [options] owner file
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change the ownership of a file; can only be done by the superuser
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cut (options) [file(s)]
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cut specified field(s)/character(s) from lines in file(s)
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date [options]
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report the current date and time
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dd [if=infile] [of=outfile] [operand=value]
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copy a file, converting between ASCII and EBCDIC or swapping byte order, as specified
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diff [options] file1 file2
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compare the two files and display the differences (text files only)
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df [options] [resource]
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report the summary of disk blocks and inodes free and in use
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du [options] [directory or file]
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report amount of disk space in use
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echo [text string]
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echo the text string to stdout
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ed or ex [options] file
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Unix line editors
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emacs [options] file
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full-screen editor
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expr arguments
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evaluate the arguments. Used to do arithmetic, etc. in the shell.
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file [options] file
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classify the file type
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find directory [options] [actions]
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find files matching a type or pattern
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finger [options] user[@hostname]
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report information about users on local and remote machines
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ftp [options] host
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transfer file(s) using file transfer protocol
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gzip [options] file, gunzip [options] file, zcat [options] file
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compress or uncompress a file. Compressed files are stored with a .gz ending
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head [-number] file
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display the first 10 (or number of) lines of a file
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hostname
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display or set (super-user only) the name of the current machine
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kill [options] [-SIGNAL] [pid#] [%job]
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send a signal to the process with the process id number (pid#) or job control number (%n). The default signal is to kill the process.
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ln [options] source_file target
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link the source_file to the target
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lpq [options], lpstat [options]
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show the status of print jobs
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lpr [options] file, lp [options] file
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print to defined printer
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lprm [options], cancel [options]
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remove a print job from the print queue
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ls [options] [directory or file]
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list directory contents or file permissions
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mail [options] [user], mailx [options] [user], Mail [options] [user]
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simple email utility available on Unix systems. Type a period as the first character on a new line to send message out, question mark for help.
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man [options] command
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show the manual (man) page for a command
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mkdir [options] directory
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make a directory
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more [options] file, less [options] file, pg [options] file
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page through a text file
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mv [options] file1 file2
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move file1 into file2
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od [options] file
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octal dump a binary file, in octal, ASCII, hex, decimal, or character mode.
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passwd [options]
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set or change your password
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paste [options] file
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paste field(s) onto the lines in file
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pr [options] file
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filter the file and print it on the terminal
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ps [options]
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show status of active processes
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pwd
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print working (current) directory
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rcp [options] hostname
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remotely copy files from this machine to another machine
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rlogin [options] hostname
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login remotely to another machine
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rm [options] file
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remove (delete) a file or directory (-r recursively deletes the directory and its contents) (-i prompts before removing files)
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rmdir [options] directory
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remove a directory
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rsh [options] hostname
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remote shell to run on another machine
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script file
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saves everything that appears on the screen to file until exit is executed
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sed [options] file
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stream editor for editing files from a script or from the command line
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sort [options] file
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sort the lines of the file according to the options chosen
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source file
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read commands from the file and execute them in the current shell. source: C shell, .: Bourne shell.
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strings [options] file
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report any sequence of 4 or more printable characters ending in <NL> or <NULL>. Usually used to search binary files for ASCII strings.
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stty [options]
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set or display terminal control options
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tail [options] file
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display the last few lines (or parts) of a file
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tar key[options] [file(s)]
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tape archiver--refer to man pages for details on creating, listing, and retrieving from archive files. Tar files can be stored on tape or disk.
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tee [options] file
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copy stdout to one or more files
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telnet [host [port]]
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communicate with another host using telnet protocol
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touch [options] [date] file
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create an empty file, or update the access time of an existing file
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tr [options] string1 string2
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translate the characters in string1 from stdin into those in string2 in stdout
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uncompress file.Z
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uncompress file.Z and save it as a file
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uniq [options] file
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remove repeated lines in a file
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uudecode [file]
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decode a uuencoded file, recreating the original file
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uuencode [file] new_name
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encode binary file to 7-bit ASCII, useful when sending via email, to be decoded as new_name at destination
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vi [options] file
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visual, full-screen editor
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wc [options] [file(s)]
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display word (or character or line) count for file(s)
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whereis [options] command
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report the binary, source, and man page locations for the command named
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which command
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reports the path to the command or the shell alias in use
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who or w
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report who is logged in and what processes are running
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zcat file.Z
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concatenate (list) uncompressed file to screen, leaving file compressed on disk
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cp [options] file1 file2
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copy file1 into file2; file2 shouldn't already exist. This command creates or overwrites file2.
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chsh (passwd -e/-s) username login_shell
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change the user's login shell (often only by the superuser)
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grep [options] 'search string' argument
egrep [options] 'search string' argument fgrep [options] 'search string' argument |
search the argument (in this case probably a file) for all occurrences of the search string, and list them.
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